Embedding optical fibers in metal alloys

Stefan Sandlin, Ari Hokkanen

Research output: Contribution to journalArticleScientificpeer-review

13 Citations (Scopus)

Abstract

This article presents a new method for embedding optical fibers into a nickel alloy and gives the results for a long-term test with thermal cycling of two fiber-optic Bragg gratings embedded in nickel alloy. We embedded these Bragg gratings in a piece of Inconel 600 (a nickel alloy) using vacuum brazing. We then thermally cycled this piece between 500, 525, and 550/spl deg/C for about six months while monitoring the reflected wavelengths of the gratings. We tested two other embedded gratings for 68 hours at 600/spl deg/C. Some microscopic cross sections of the embedded fibers are presented. The results show that fiber sensors embedded in metal can operate reliably at very high temperature and in harsh environments. We hope that the results from the long-term, elevated temperature test will make it possible to apply the technology of fiber-optic sensing in new and demanding monitoring applications, especially at high temperatures in energy production.
Original languageEnglish
Pages (from-to)31-36
Number of pages6
JournalIEEE Instrumentation and Measurement Magazine
Volume6
Issue number2
DOIs
Publication statusPublished - 2003
MoE publication typeA1 Journal article-refereed

Fingerprint

nickel alloys
Nickel alloys
embedding
Optical fibers
Bragg gratings
optical fibers
Fiber optics
fiber optics
Metals
Vacuum brazing
gratings
metals
brazing
Inconel (trademark)
fibers
Fibers
Monitoring
Thermal cycling
Temperature
Wavelength

Cite this

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title = "Embedding optical fibers in metal alloys",
abstract = "This article presents a new method for embedding optical fibers into a nickel alloy and gives the results for a long-term test with thermal cycling of two fiber-optic Bragg gratings embedded in nickel alloy. We embedded these Bragg gratings in a piece of Inconel 600 (a nickel alloy) using vacuum brazing. We then thermally cycled this piece between 500, 525, and 550/spl deg/C for about six months while monitoring the reflected wavelengths of the gratings. We tested two other embedded gratings for 68 hours at 600/spl deg/C. Some microscopic cross sections of the embedded fibers are presented. The results show that fiber sensors embedded in metal can operate reliably at very high temperature and in harsh environments. We hope that the results from the long-term, elevated temperature test will make it possible to apply the technology of fiber-optic sensing in new and demanding monitoring applications, especially at high temperatures in energy production.",
author = "Stefan Sandlin and Ari Hokkanen",
note = "Project code: H0SU00884",
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language = "English",
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journal = "IEEE Instrumentation and Measurement Magazine",
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Embedding optical fibers in metal alloys. / Sandlin, Stefan; Hokkanen, Ari.

In: IEEE Instrumentation and Measurement Magazine, Vol. 6, No. 2, 2003, p. 31-36.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Embedding optical fibers in metal alloys

AU - Sandlin, Stefan

AU - Hokkanen, Ari

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PY - 2003

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N2 - This article presents a new method for embedding optical fibers into a nickel alloy and gives the results for a long-term test with thermal cycling of two fiber-optic Bragg gratings embedded in nickel alloy. We embedded these Bragg gratings in a piece of Inconel 600 (a nickel alloy) using vacuum brazing. We then thermally cycled this piece between 500, 525, and 550/spl deg/C for about six months while monitoring the reflected wavelengths of the gratings. We tested two other embedded gratings for 68 hours at 600/spl deg/C. Some microscopic cross sections of the embedded fibers are presented. The results show that fiber sensors embedded in metal can operate reliably at very high temperature and in harsh environments. We hope that the results from the long-term, elevated temperature test will make it possible to apply the technology of fiber-optic sensing in new and demanding monitoring applications, especially at high temperatures in energy production.

AB - This article presents a new method for embedding optical fibers into a nickel alloy and gives the results for a long-term test with thermal cycling of two fiber-optic Bragg gratings embedded in nickel alloy. We embedded these Bragg gratings in a piece of Inconel 600 (a nickel alloy) using vacuum brazing. We then thermally cycled this piece between 500, 525, and 550/spl deg/C for about six months while monitoring the reflected wavelengths of the gratings. We tested two other embedded gratings for 68 hours at 600/spl deg/C. Some microscopic cross sections of the embedded fibers are presented. The results show that fiber sensors embedded in metal can operate reliably at very high temperature and in harsh environments. We hope that the results from the long-term, elevated temperature test will make it possible to apply the technology of fiber-optic sensing in new and demanding monitoring applications, especially at high temperatures in energy production.

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DO - 10.1109/MIM.2003.1200281

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